Aramco is building the new facilities to expand its natural gas production capacity and meet the increasing domestic energy demand, reported Saudi Press Agency.
Gas produced from the Midyan field is expected to be used by power plants in the country and generate electricity.
L&T will construct the gas processing plant with a capacity of 75 million cubic feet per day of non-associated gas and 4,500 barrels of condensate per day.
The project, which is expected to begin operations in mid-2016, will include building two pipelines of 98km that will supply gas and hydrocarbon liquids to a power plant near Duba.